Steam-engine.



No. 722,055. PATENTED MAR. 3, 1903. G. W. A. TAYLOR.

STEAM ENGINE.

APPLICATION FILED APR. 20. 1902.

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No. 722,055. PATENTED MAR. 3, 1903.1 G. W. A. TAYLOR.

STEAM ENGINE.

APPLIOATION FILED An. 2a. 1902. no xonnn. 2 sums-sum: 2.

' UNTTED STATES ATE T O FFICE CHARLES XVILLIAM ALEXANDER TAYLOR, OF LIVERPOOL, ENGLAND, AS- SIGNOR OF ONE-HALE TO JOHN STOREY, OF LIVERPOOL, ENGLAND.

STEAM-ENGINE.

a'k'niCIFIGATION forming part of Letters Patent No. 722,055, dated March 3, 1903.

Application filed April 28, 1902. Serial No. 105,082. (No model.)

To all wit/0111 it may conccwt:

Be it known that 1, CHARLES WILLIAM AL- EXANDER TAYLOR, engineer, a subject of the King of Great Britain, residing in Liverpool, in the county of Lancaster, England, (whose full postal address is 8 Ash Grove, Seaforth, Liverpool, aforesaid,) have invented certain new and useful Improvements in Steam-Engines, (for which applications have been made in Great Britain, dated January 10, 1902, and April 21, 1902,) of which the following is a specification.

This invention has for its object, among other things, to provide an improved valve for steam and other engines which will be comparatively cheap to manufacture and which will run the engine ata high speed with smoothness and uniformity of motion in either direction.

In the accompanying drawings, Figure 1 is a longitudinal section of a steam-engine cylinder with my invention applied thereto; Fig. 2, an end view; Fig. 3, a longitudinal section of the valve separate from the valvechest, but projected off the latter, so as to show its position for driving the engine forward. Fig. 4 shows my invention applied to an engine for driving a winch or steering-gear.

Referring to Figs. 1, 2, and 3, the valve I em ploy has no internal partitions, but is made in the form of a hollowcylinder a, (with ports,) adapted to rotate within a bored cylindrical chest or casing I), also provided with ports. This chest is closed by a cover t at one end, while at the other it has a stuffing-box a for the valve-spindle cl. This valve is arranged so that it can he slid longitudinally within the chest I) when required by suitable external fittings, such as those hereinafter described, so as to bring one set of ports into action and shift the other set out of action, thus reversing the engine, as hereinafter explained. (Z is the rod rotating the valve, also for sliding it longitudinally. efare the steam-ports in the chest 2), leading to opposite ends of the cylinder 0, and as the cylindrical valve rotates the ports and emloaym en ts therein open and close the ports in the chest I), which forms the valve-seat. g is a port of the chest leading to the exhaust. j is are the ports in the cylindrical rotating valve a on opposite sides, or nearly so, adapted to open and close the steam-ports efalternately. 02 are hollow cavities or embayments in the valve arranged alternately to connect and disconnect the steam-ports e and f with the exhaust g-that is to say, as one of the steam-ports of the valve-say j-ad1nits steam into the cylinder 3 through cylinder-port e the embayment or cavity n in the valve connects the other port f with the exhaust or as the steam-port 7c admits steam into the cylinder through the passage f the einbayment p in the valve connects the other port. 6 with the exhaust g. The steam-ports and embayments act alternately, so as to admit and exhaust steam to and from opposite ends of the cylinder. These steam-ports j and 7c aforesaid in the valve are arranged in advance of the crank, so as to give a forward motion to the engine. By providing another set of ports h i in the valve and another pair of embayments m 0 at an equal distance behind the crank then by sliding the valve (1 longitudinally one set of ports and embayments are broughtinto action and anotherset shifted out of action, and consequently the motion of the engine is reversed. In one position of the valve-that is,when the engine is being driven forward (or it might be backward)-the steam is admitted into the inside of the cylindrical valve by means of the feed-pipe r in the valvechest I) delivering steam into the annular channels, and the steam-port h admits steam as the valve 01- revolves from the annular channel 8 into the interior of the valve ct. By sliding this valve a longitudinally the steam-port h is moved out of communication with the annular channel 3, and steam admission is cut off and steam cannot be admitted during the act of reversing the engine. It is only when the valve has nearly completed its longitudinal movement that the end of the cylindrical valve uncovers the annular channel 3 in the valve-chest and allows steam to flow into the inside of the valve. No steam can, however, be admitted from the feed-pipe 1" when the valve a is in an intermediate position, so that no waste can occur through leakage of steam into wrong ports. The ports 6 g f are located at the bottom of the chest 5, and the respective steam-passages the ports are.

curve around and enter the cylinder at the side, the object being to insure the valve seating itself on the bottom of the chest, where This is of the utmost importance, because if they were not in that position any wear of the valve would cause its ported surface to come out of contact with the ported seat of the chest, which would result in steam leakage. By my invention, however, the weight of the valve keeps it normally on its seat even if worn, and the steam-pressure when the steam is turned on has the effect of pressing the valve on its seat.

Referring to Fig. 4, c is the cylinder; b, a cylindrical valve-chamber which in this particular instance is raised above the center line of the cylinder for convenience in driving the spindle from the main crank-shaft o. w is a lever with shifting fork engaging between collars :r on the rod d, this lever being pivoted at 3 so that by pulling over the lever w in one direction or the other the valve a is slid longitudinally, so as to bring one set of ports, 7' 7c and n p, or the other set, h t and m 0, into use. 2 represents the bearings for the spindle d. The spindle is driven by means of the skew-wheel 3 on the valve-spindle d. 4 is a feather-key on the spindle d, which insures the said spindle being driven by the skew-wheel 3 and yet permits the spindle to he slid longitudinally when required. 5 is the piston-rod, 6 the connecting-rod, and 7 the crank. The axis of the lever w is formed asa hollow shaft 9,with ports to admit steam into the valve-chest through steampipe 8 or to cut off the steam-supply therefrom, according to the position of the lever. 10 is the box in which the shaft 9 works. Thus in mid-position of the lever 10 the steam would be out off, or when thrown over to the right or left the steam is turned on.

I declare that what I claim is 1. In steam' and other engines a hollow rotary cylinder, a bored cylindrical chest within which a cylindrical valve rotates and forms its seat, passages leading from the said chest to the opposite ends of theengine-cylinder and to the exhaust, ports on opposite sides'of the valve adapted to open and close the steam-ports in the steam-chest, embayments in the valve arranged to alternately connect and disconnect the steam-passages in the valve-chest with the exhaust, said ports and embayments being arranged in two sets. and means for sliding the valve longitudinally so as to bring one set of ports and embayments into action the other set out of action.

2. In a steam or other engine, the combination of a hollow, rotary, cylindrical, slidable valve having ports therein; a cylindrical chest within which the cylindrical valve rotates and is seated; a feed-pipe for steam; and an annular channelinside said chest communicating with the steam-pipe and so arranged as to admit steam into the inside of the rotary valve only when a port in said valve is uncovered, due to the movement of the valve, whereby no steam can pass into the hollow valve in intermediate positions thereof, thus preventing leakage of steam through wrong ports.

In witness whereof I have hereunto signed my name, this 18th day of April, 1902, in the presence of two subscribing witnesses.

CHARLES WILLIAM ALEXANDER TAYLOR.

Witnesses:

G. O. DYMOND, F. P. EVANS. 

